72401678 has 16 divisors (see below), whose sum is σ = 113374080. Its totient is φ = 34636800.

The previous prime is 72401669. The next prime is 72401689. The reversal of 72401678 is 87610427.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1043 + ... + 12078.

It is an arithmetic number, because the mean of its divisors is an integer number (7085880).

Almost surely, 2^72401678 is an apocalyptic number.

72401678 is a deficient number, since it is larger than the sum of its proper divisors (40972402).

72401678 is a wasteful number, since it uses less digits than its factorization.

72401678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13243.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 72401678 is about 8508.9175574805. The cubic root of 72401678 is about 416.7889636385.

The spelling of 72401678 in words is "seventy-two million, four hundred one thousand, six hundred seventy-eight".