45078978 has 32 divisors (see below), whose sum is σ = 103670784. Its totient is φ = 12800592.

The previous prime is 45078973. The next prime is 45078997. The reversal of 45078978 is 87987054.

It is a super-2 number, since 2×45078978² = 4064228515048968, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45078973) 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, 3801 + ... + 10227.

It is an arithmetic number, because the mean of its divisors is an integer number (3239712).

Almost surely, 2^45078978 is an apocalyptic number.

45078978 is an abundant number, since it is smaller than the sum of its proper divisors (58591806).

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

45078978 is a wasteful number, since it uses less digits than its factorization.

45078978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6606.

The product of its (nonzero) digits is 564480, while the sum is 48.

The square root of 45078978 is about 6714.0880244453. The cubic root of 45078978 is about 355.8972949951.

It can be divided in two parts, 45078 and 978, that added together give a triangular number (46056 = T₃₀₃).

The spelling of 45078978 in words is "forty-five million, seventy-eight thousand, nine hundred seventy-eight".