72428157002 has 4 divisors (see below), whose sum is σ = 108642235506. Its totient is φ = 36214078500.

The previous prime is 72428156989. The next prime is 72428157077. The reversal of 72428157002 is 20075182427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 63968020561 + 8460136441 = 252919^2 + 91979^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18107039249 + ... + 18107039252.

Almost surely, 2^72428157002 is an apocalyptic number.

72428157002 is a deficient number, since it is larger than the sum of its proper divisors (36214078504).

72428157002 is a wasteful number, since it uses less digits than its factorization.

72428157002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36214078503.

The product of its (nonzero) digits is 62720, while the sum is 38.

The spelling of 72428157002 in words is "seventy-two billion, four hundred twenty-eight million, one hundred fifty-seven thousand, two".