72497408 has 18 divisors (see below), whose sum is σ = 144712134. Its totient is φ = 36248576.

The previous prime is 72497363. The next prime is 72497423. The reversal of 72497408 is 80479427.

It can be written as a sum of positive squares in only one way, i.e., 72454144 + 43264 = 8512^2 + 208^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141341 + ... + 141852.

It is an arithmetic number, because the mean of its divisors is an integer number (8039563).

Almost surely, 2^72497408 is an apocalyptic number.

It is an amenable number.

72497408 is a deficient number, since it is larger than the sum of its proper divisors (72214726).

72497408 is an equidigital number, since it uses as much as digits as its factorization.

72497408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283209 (or 283195 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 72497408 is about 8514.5409741219. The cubic root of 72497408 is about 416.9725764888.

The spelling of 72497408 in words is "seventy-two million, four hundred ninety-seven thousand, four hundred eight".