1572233940 has 144 divisors (see below), whose sum is σ = 4950481536. Its totient is φ = 403603200.

The previous prime is 1572233911. The next prime is 1572233959. The reversal of 1572233940 is 493322751.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1572233895 and 1572233904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 548110 + ... + 550970.

It is an arithmetic number, because the mean of its divisors is an integer number (34378344).

Almost surely, 2^1572233940 is an apocalyptic number.

1572233940 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 1572233940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2475240768).

1572233940 is an abundant number, since it is smaller than the sum of its proper divisors (3378247596).

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

1572233940 is a wasteful number, since it uses less digits than its factorization.

1572233940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2990 (or 2985 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 1572233940 is about 39651.4052714403. The cubic root of 1572233940 is about 1162.8018723502.

The spelling of 1572233940 in words is "one billion, five hundred seventy-two million, two hundred thirty-three thousand, nine hundred forty".