45678978 has 40 divisors (see below), whose sum is σ = 102744972. Its totient is φ = 15168384.

The previous prime is 45678977. The next prime is 45679019. The reversal of 45678978 is 87987654.

45678978 is a `hidden beast` number, since 4 + 567 + 8 + 9 + 78 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 45198729 + 480249 = 6723^2 + 693^2 .

It is a super-2 number, since 2×45678978² = 4173138062248968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45678977) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 73726 + ... + 74342.

Almost surely, 2^45678978 is an apocalyptic number.

45678978 is an abundant number, since it is smaller than the sum of its proper divisors (57065994).

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

45678978 is a wasteful number, since it uses less digits than its factorization.

45678978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088 (or 1079 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 45678978 is about 6758.6224927865. The cubic root of 45678978 is about 357.4693353978.

It can be divided in two parts, 45678 and 978, that added together give a 6-th power (46656 = 6⁶).

The spelling of 45678978 in words is "forty-five million, six hundred seventy-eight thousand, nine hundred seventy-eight".