45012440 has 32 divisors (see below), whose sum is σ = 110486160. Its totient is φ = 16368000.

The previous prime is 45012433. The next prime is 45012467. The reversal of 45012440 is 4421054.

It is a super-2 number, since 2×45012440² = 4052239509507200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

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

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, 50711 + ... + 51590.

Almost surely, 2^45012440 is an apocalyptic number.

45012440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45012440 is an abundant number, since it is smaller than the sum of its proper divisors (65473720).

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

45012440 is a wasteful number, since it uses less digits than its factorization.

45012440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102323 (or 102319 counting only the distinct ones).

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

The square root of 45012440 is about 6709.1310912815. The cubic root of 45012440 is about 355.7221035423.

Adding to 45012440 its reverse (4421054), we get a palindrome (49433494).

The spelling of 45012440 in words is "forty-five million, twelve thousand, four hundred forty".