72447954 has 16 divisors (see below), whose sum is σ = 145648992. Its totient is φ = 24023808.

The previous prime is 72447941. The next prime is 72447967. The reversal of 72447954 is 45974427.

It is an interprime number because it is at equal distance from previous prime (72447941) and next prime (72447967).

It is a super-2 number, since 2×72447954² = 10497412077572232, which contains 22 as substring.

It is a Curzon 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, 30124 + ... + 32439.

It is an arithmetic number, because the mean of its divisors is an integer number (9103062).

Almost surely, 2^72447954 is an apocalyptic number.

72447954 is an abundant number, since it is smaller than the sum of its proper divisors (73201038).

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

72447954 is a wasteful number, since it uses less digits than its factorization.

72447954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62761.

The product of its digits is 282240, while the sum is 42.

The square root of 72447954 is about 8511.6363879104. The cubic root of 72447954 is about 416.8777425125.

The spelling of 72447954 in words is "seventy-two million, four hundred forty-seven thousand, nine hundred fifty-four".