1523672538 has 8 divisors (see below), whose sum is σ = 3047345088. Its totient is φ = 507890844.

The previous prime is 1523672533. The next prime is 1523672539. The reversal of 1523672538 is 8352763251.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1523672538 is an admirable number.

It is a super-2 number, since 2×1523672538² = 4643156006110722888, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1523672538.

It is not an unprimeable number, because it can be changed into a prime (1523672533) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 126972706 + ... + 126972717.

It is an arithmetic number, because the mean of its divisors is an integer number (380918136).

Almost surely, 2^1523672538 is an apocalyptic number.

1523672538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1523672538 is a wasteful number, since it uses less digits than its factorization.

1523672538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253945428.

The product of its digits is 302400, while the sum is 42.

The square root of 1523672538 is about 39034.2482699488. The cubic root of 1523672538 is about 1150.7046816540.

The spelling of 1523672538 in words is "one billion, five hundred twenty-three million, six hundred seventy-two thousand, five hundred thirty-eight".