72067858 has 4 divisors (see below), whose sum is σ = 108101790. Its totient is φ = 36033928.

The previous prime is 72067847. The next prime is 72067861. The reversal of 72067858 is 85876027.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85876027 = 17 ⋅5051531.

It can be written as a sum of positive squares in only one way, i.e., 42289009 + 29778849 = 6503^2 + 5457^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18016963 + ... + 18016966.

Almost surely, 2^72067858 is an apocalyptic number.

72067858 is a deficient number, since it is larger than the sum of its proper divisors (36033932).

72067858 is a wasteful number, since it uses less digits than its factorization.

72067858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36033931.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 72067858 is about 8489.2790035432. The cubic root of 72067858 is about 416.1474183214.

The spelling of 72067858 in words is "seventy-two million, sixty-seven thousand, eight hundred fifty-eight".