1572379380 has 432 divisors, whose sum is σ = 5832013824. Its totient is φ = 339655680.

The previous prime is 1572379373. The next prime is 1572379381. The reversal of 1572379380 is 839732751.

It is a happy number.

1572379380 is a `hidden beast` number, since 1 + 572 + 3 + 79 + 3 + 8 + 0 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1572379381) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 12380877 + ... + 12381003.

It is an arithmetic number, because the mean of its divisors is an integer number (13500032).

Almost surely, 2^1572379380 is an apocalyptic number.

1572379380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1572379380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2916006912).

1572379380 is an abundant number, since it is smaller than the sum of its proper divisors (4259634444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1572379380 is a wasteful number, since it uses less digits than its factorization.

1572379380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 1572379380 is about 39653.2392119484. The cubic root of 1572379380 is about 1162.8377263635.

The spelling of 1572379380 in words is "one billion, five hundred seventy-two million, three hundred seventy-nine thousand, three hundred eighty".