72354478 has 32 divisors (see below), whose sum is σ = 130968000. Its totient is φ = 29931552.

The previous prime is 72354437. The next prime is 72354493. The reversal of 72354478 is 87445327.

It is a self number, because there is not a number n which added to its sum of digits gives 72354478.

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, 18076 + ... + 21712.

It is an arithmetic number, because the mean of its divisors is an integer number (4092750).

Almost surely, 2^72354478 is an apocalyptic number.

72354478 is a deficient number, since it is larger than the sum of its proper divisors (58613522).

72354478 is a wasteful number, since it uses less digits than its factorization.

72354478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3689 (or 3675 counting only the distinct ones).

The product of its digits is 188160, while the sum is 40.

The square root of 72354478 is about 8506.1435445212. The cubic root of 72354478 is about 416.6983731250.

The spelling of 72354478 in words is "seventy-two million, three hundred fifty-four thousand, four hundred seventy-eight".