72381078 has 48 divisors (see below), whose sum is σ = 195526656. Its totient is φ = 18799920.

The previous prime is 72381059. The next prime is 72381097. The reversal of 72381078 is 87018327.

It is an interprime number because it is at equal distance from previous prime (72381059) and next prime (72381097).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24726 + ... + 27497.

It is an arithmetic number, because the mean of its divisors is an integer number (4073472).

Almost surely, 2^72381078 is an apocalyptic number.

72381078 is an abundant number, since it is smaller than the sum of its proper divisors (123145578).

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

72381078 is a wasteful number, since it uses less digits than its factorization.

72381078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52249 (or 52246 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 72381078 is about 8507.7069766183. The cubic root of 72381078 is about 416.7494310968.

The spelling of 72381078 in words is "seventy-two million, three hundred eighty-one thousand, seventy-eight".