72497140 has 24 divisors (see below), whose sum is σ = 155786400. Its totient is φ = 28324128.

The previous prime is 72497137. The next prime is 72497147. The reversal of 72497140 is 4179427.

It is a junction number, because it is equal to n+sod(n) for n = 72497096 and 72497105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72497147) 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, 41290 + ... + 43009.

It is an arithmetic number, because the mean of its divisors is an integer number (6491100).

Almost surely, 2^72497140 is an apocalyptic number.

It is an amenable number.

72497140 is an abundant number, since it is smaller than the sum of its proper divisors (83289260).

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

72497140 is a wasteful number, since it uses less digits than its factorization.

72497140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84351 (or 84349 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 72497140 is about 8514.5252363241. The cubic root of 72497140 is about 416.9720626829.

The spelling of 72497140 in words is "seventy-two million, four hundred ninety-seven thousand, one hundred forty".