1901970720 has 576 divisors, whose sum is σ = 7489407744. Its totient is φ = 452874240.

The previous prime is 1901970709. The next prime is 1901970739. The reversal of 1901970720 is 270791091.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26788285 + ... + 26788355.

It is an arithmetic number, because the mean of its divisors is an integer number (13002444).

Almost surely, 2^1901970720 is an apocalyptic number.

1901970720 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 1901970720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3744703872).

1901970720 is an abundant number, since it is smaller than the sum of its proper divisors (5587437024).

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

1901970720 is a wasteful number, since it uses less digits than its factorization.

1901970720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 1901970720 is about 43611.5892854182. The cubic root of 1901970720 is about 1238.9904026366.

The spelling of 1901970720 in words is "one billion, nine hundred one million, nine hundred seventy thousand, seven hundred twenty".