45452778 has 16 divisors (see below), whose sum is σ = 103892160. Its totient is φ = 12986496.

The previous prime is 45452777. The next prime is 45452779. The reversal of 45452778 is 87725454.

It is an interprime number because it is at equal distance from previous prime (45452777) and next prime (45452779).

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1082209 = 45452778 / (4 + 5 + 4 + 5 + 2 + 7 + 7 + 8).

It is not an unprimeable number, because it can be changed into a prime (45452777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541063 + ... + 541146.

It is an arithmetic number, because the mean of its divisors is an integer number (6493260).

Almost surely, 2^45452778 is an apocalyptic number.

45452778 is an abundant number, since it is smaller than the sum of its proper divisors (58439382).

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

45452778 is a wasteful number, since it uses less digits than its factorization.

45452778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082221.

The product of its digits is 313600, while the sum is 42.

The square root of 45452778 is about 6741.8675454209. The cubic root of 45452778 is about 356.8783020133.

The spelling of 45452778 in words is "forty-five million, four hundred fifty-two thousand, seven hundred seventy-eight".