72616240 has 20 divisors (see below), whose sum is σ = 168832944. Its totient is φ = 29046464.

The previous prime is 72616223. The next prime is 72616249. The reversal of 72616240 is 4261627.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 72616199 and 72616208.

It is not an unprimeable number, because it can be changed into a prime (72616249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453772 + ... + 453931.

Almost surely, 2^72616240 is an apocalyptic number.

It is an amenable number.

72616240 is an abundant number, since it is smaller than the sum of its proper divisors (96216704).

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

72616240 is a wasteful number, since it uses less digits than its factorization.

72616240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907716 (or 907710 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 72616240 is about 8521.5162969979. The cubic root of 72616240 is about 417.2002749154.

Adding to 72616240 its reverse (4261627), we get a palindrome (76877867).

The spelling of 72616240 in words is "seventy-two million, six hundred sixteen thousand, two hundred forty".