72952538 has 4 divisors (see below), whose sum is σ = 109428810. Its totient is φ = 36476268.

The previous prime is 72952519. The next prime is 72952541. The reversal of 72952538 is 83525927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83525927 = 163 ⋅512429.

It can be written as a sum of positive squares in only one way, i.e., 61575409 + 11377129 = 7847^2 + 3373^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72952495 and 72952504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18238133 + ... + 18238136.

Almost surely, 2^72952538 is an apocalyptic number.

72952538 is a deficient number, since it is larger than the sum of its proper divisors (36476272).

72952538 is a wasteful number, since it uses less digits than its factorization.

72952538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36476271.

The product of its digits is 151200, while the sum is 41.

The square root of 72952538 is about 8541.2257902481. The cubic root of 72952538 is about 417.8433247517.

The spelling of 72952538 in words is "seventy-two million, nine hundred fifty-two thousand, five hundred thirty-eight".