72673690 has 32 divisors (see below), whose sum is σ = 133929936. Its totient is φ = 28385280.

The previous prime is 72673687. The next prime is 72673697. The reversal of 72673690 is 9637627.

It can be written as a sum of positive squares in 8 ways, for example, as 4297329 + 68376361 = 2073^2 + 8269^2 .

It is a super-2 number, since 2×72673690² = 10562930436432200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72673697) 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 in 15 ways as a sum of consecutive naturals, for example, 82050 + ... + 82930.

Almost surely, 2^72673690 is an apocalyptic number.

72673690 is a deficient number, since it is larger than the sum of its proper divisors (61256246).

72673690 is a wasteful number, since it uses less digits than its factorization.

72673690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074.

The product of its (nonzero) digits is 95256, while the sum is 40.

The square root of 72673690 is about 8524.8865095085. The cubic root of 72673690 is about 417.3102679317.

The spelling of 72673690 in words is "seventy-two million, six hundred seventy-three thousand, six hundred ninety".