45729778 has 32 divisors (see below), whose sum is σ = 72969984. Its totient is φ = 21470592.

The previous prime is 45729757. The next prime is 45729797. The reversal of 45729778 is 87792754.

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, 333726 + ... + 333862.

It is an arithmetic number, because the mean of its divisors is an integer number (2280312).

Almost surely, 2^45729778 is an apocalyptic number.

45729778 is a deficient number, since it is larger than the sum of its proper divisors (27240206).

45729778 is a wasteful number, since it uses less digits than its factorization.

45729778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306.

The product of its digits is 987840, while the sum is 49.

The square root of 45729778 is about 6762.3796107583. The cubic root of 45729778 is about 357.6018012528.

The spelling of 45729778 in words is "forty-five million, seven hundred twenty-nine thousand, seven hundred seventy-eight".