72154830 has 32 divisors (see below), whose sum is σ = 188915328. Its totient is φ = 17492000.

The previous prime is 72154829. The next prime is 72154843. The reversal of 72154830 is 3845127.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108996 + ... + 109655.

It is an arithmetic number, because the mean of its divisors is an integer number (5903604).

Almost surely, 2^72154830 is an apocalyptic number.

72154830 is an abundant number, since it is smaller than the sum of its proper divisors (116760498).

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

72154830 is a wasteful number, since it uses less digits than its factorization.

72154830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218672.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 72154830 is about 8494.3999199473. The cubic root of 72154830 is about 416.3147542398.

Adding to 72154830 its reverse (3845127), we get a palindrome (75999957).

The spelling of 72154830 in words is "seventy-two million, one hundred fifty-four thousand, eight hundred thirty".