45155640 has 32 divisors (see below), whose sum is σ = 135467280. Its totient is φ = 12041472.

The previous prime is 45155599. The next prime is 45155659. The reversal of 45155640 is 4655154.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 45155598 and 45155607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188029 + ... + 188268.

Almost surely, 2^45155640 is an apocalyptic number.

45155640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45155640 is an abundant number, since it is smaller than the sum of its proper divisors (90311640).

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

45155640 is a wasteful number, since it uses less digits than its factorization.

45155640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376311 (or 376307 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 45155640 is about 6719.7946397193. The cubic root of 45155640 is about 356.0989288668.

The spelling of 45155640 in words is "forty-five million, one hundred fifty-five thousand, six hundred forty".