72345776 has 10 divisors (see below), whose sum is σ = 140169972. Its totient is φ = 36172880.

The previous prime is 72345773. The next prime is 72345799. The reversal of 72345776 is 67754327.

It is a super-2 number, since 2×72345776² = 10467822610084352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72345773) by changing a digit.

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, 2260790 + ... + 2260821.

Almost surely, 2^72345776 is an apocalyptic number.

It is an amenable number.

72345776 is a deficient number, since it is larger than the sum of its proper divisors (67824196).

72345776 is a wasteful number, since it uses less digits than its factorization.

72345776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521619 (or 4521613 counting only the distinct ones).

The product of its digits is 246960, while the sum is 41.

The square root of 72345776 is about 8505.6320164935. The cubic root of 72345776 is about 416.6816671577.

The spelling of 72345776 in words is "seventy-two million, three hundred forty-five thousand, seven hundred seventy-six".