72056478 has 32 divisors (see below), whose sum is σ = 155697696. Its totient is φ = 22099968.

The previous prime is 72056473. The next prime is 72056483. The reversal of 72056478 is 87465027.

It is an interprime number because it is at equal distance from previous prime (72056473) and next prime (72056483).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72056473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26226 + ... + 28842.

It is an arithmetic number, because the mean of its divisors is an integer number (4865553).

Almost surely, 2^72056478 is an apocalyptic number.

72056478 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

72056478 is an abundant number, since it is smaller than the sum of its proper divisors (83641218).

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

72056478 is a wasteful number, since it uses less digits than its factorization.

72056478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 72056478 is about 8488.6087199258. The cubic root of 72056478 is about 416.1255130086.

The spelling of 72056478 in words is "seventy-two million, fifty-six thousand, four hundred seventy-eight".