72753978 has 16 divisors (see below), whose sum is σ = 158736096. Its totient is φ = 22046640.

The previous prime is 72753971. The next prime is 72754039. The reversal of 72753978 is 87935727.

It is not an unprimeable number, because it can be changed into a prime (72753971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551101 + ... + 551232.

It is an arithmetic number, because the mean of its divisors is an integer number (9921006).

Almost surely, 2^72753978 is an apocalyptic number.

72753978 is an abundant number, since it is smaller than the sum of its proper divisors (85982118).

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

72753978 is a wasteful number, since it uses less digits than its factorization.

72753978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102349.

The product of its digits is 740880, while the sum is 48.

The square root of 72753978 is about 8529.5942459181. The cubic root of 72753978 is about 417.4638892119.

The spelling of 72753978 in words is "seventy-two million, seven hundred fifty-three thousand, nine hundred seventy-eight".