1520358372 has 72 divisors (see below), whose sum is σ = 4200612416. Its totient is φ = 460810944.

The previous prime is 1520358299. The next prime is 1520358377. The reversal of 1520358372 is 2738530251.

It is a happy number.

1520358372 is a `hidden beast` number, since 1 + 5 + 2 + 0 + 3 + 583 + 72 = 666.

It is a super-2 number, since 2×1520358372² = 4622979158620980768, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1520358377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7113 + ... + 55599.

Almost surely, 2^1520358372 is an apocalyptic number.

1520358372 is a gapful number since it is divisible by the number (12) 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 1520358372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2100306208).

1520358372 is an abundant number, since it is smaller than the sum of its proper divisors (2680254044).

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

1520358372 is a wasteful number, since it uses less digits than its factorization.

1520358372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48577 (or 48572 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 1520358372 is about 38991.7731322904. The cubic root of 1520358372 is about 1149.8697702561.

The spelling of 1520358372 in words is "one billion, five hundred twenty million, three hundred fifty-eight thousand, three hundred seventy-two".