72678550 has 24 divisors (see below), whose sum is σ = 154494576. Its totient is φ = 24918240.

The previous prime is 72678547. The next prime is 72678563. The reversal of 72678550 is 5587627.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103477 + ... + 104176.

It is an arithmetic number, because the mean of its divisors is an integer number (6437274).

Almost surely, 2^72678550 is an apocalyptic number.

72678550 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72678550 is an abundant number, since it is smaller than the sum of its proper divisors (81816026).

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

72678550 is a wasteful number, since it uses less digits than its factorization.

72678550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207672 (or 207667 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 72678550 is about 8525.1715525261. The cubic root of 72678550 is about 417.3195701643.

The spelling of 72678550 in words is "seventy-two million, six hundred seventy-eight thousand, five hundred fifty".