73323978 has 32 divisors (see below), whose sum is σ = 180491136. Its totient is φ = 19338048.

The previous prime is 73323947. The next prime is 73323989. The reversal of 73323978 is 87932337.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 66601 + ... + 67692.

It is an arithmetic number, because the mean of its divisors is an integer number (5640348).

Almost surely, 2^73323978 is an apocalyptic number.

73323978 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

73323978 is an abundant number, since it is smaller than the sum of its proper divisors (107167158).

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

73323978 is a wasteful number, since it uses less digits than its factorization.

73323978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134318.

The product of its digits is 190512, while the sum is 42.

The square root of 73323978 is about 8562.9421345703. The cubic root of 73323978 is about 418.5512784580.

The spelling of 73323978 in words is "seventy-three million, three hundred twenty-three thousand, nine hundred seventy-eight".