72454678 has 4 divisors (see below), whose sum is σ = 108682020. Its totient is φ = 36227338.

The previous prime is 72454661. The next prime is 72454687. The reversal of 72454678 is 87645427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87645427 = 83 ⋅1055969.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18113668 + ... + 18113671.

It is an arithmetic number, because the mean of its divisors is an integer number (27170505).

Almost surely, 2^72454678 is an apocalyptic number.

72454678 is a deficient number, since it is larger than the sum of its proper divisors (36227342).

72454678 is a wasteful number, since it uses less digits than its factorization.

72454678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36227341.

The product of its digits is 376320, while the sum is 43.

The square root of 72454678 is about 8512.0313674234. The cubic root of 72454678 is about 416.8906391234.

The spelling of 72454678 in words is "seventy-two million, four hundred fifty-four thousand, six hundred seventy-eight".