72658420 has 24 divisors (see below), whose sum is σ = 157506048. Its totient is φ = 28125600.

The previous prime is 72658409. The next prime is 72658423. The reversal of 72658420 is 2485627.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72658423) 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, 57976 + ... + 59215.

It is an arithmetic number, because the mean of its divisors is an integer number (6562752).

Almost surely, 2^72658420 is an apocalyptic number.

It is an amenable number.

72658420 is an abundant number, since it is smaller than the sum of its proper divisors (84847628).

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

72658420 is a wasteful number, since it uses less digits than its factorization.

72658420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117231 (or 117229 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 72658420 is about 8523.9908493616. The cubic root of 72658420 is about 417.2810378479.

The spelling of 72658420 in words is "seventy-two million, six hundred fifty-eight thousand, four hundred twenty".