72517340 has 24 divisors (see below), whose sum is σ = 174041952. Its totient is φ = 24863040.

The previous prime is 72517337. The next prime is 72517351. The reversal of 72517340 is 4371527.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258851 + ... + 259130.

It is an arithmetic number, because the mean of its divisors is an integer number (7251748).

Almost surely, 2^72517340 is an apocalyptic number.

72517340 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72517340 is an abundant number, since it is smaller than the sum of its proper divisors (101524612).

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

72517340 is a wasteful number, since it uses less digits than its factorization.

72517340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517997 (or 517995 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 72517340 is about 8515.7113619474. The cubic root of 72517340 is about 417.0107862956.

Adding to 72517340 its reverse (4371527), we get a palindrome (76888867).

The spelling of 72517340 in words is "seventy-two million, five hundred seventeen thousand, three hundred forty".