45402140 has 24 divisors (see below), whose sum is σ = 108965472. Its totient is φ = 15566400.

The previous prime is 45402103. The next prime is 45402143. The reversal of 45402140 is 4120454.

It is a super-2 number, since 2×45402140² = 4122708633159200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45402143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162011 + ... + 162290.

It is an arithmetic number, because the mean of its divisors is an integer number (4540228).

Almost surely, 2^45402140 is an apocalyptic number.

It is an amenable number.

45402140 is an abundant number, since it is smaller than the sum of its proper divisors (63563332).

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

45402140 is a wasteful number, since it uses less digits than its factorization.

45402140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324317 (or 324315 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 45402140 is about 6738.1110112553. Note that the first 3 decimals coincide. The cubic root of 45402140 is about 356.7457225210.

Adding to 45402140 its reverse (4120454), we get a palindrome (49522594).

The spelling of 45402140 in words is "forty-five million, four hundred two thousand, one hundred forty".