45223440 has 40 divisors (see below), whose sum is σ = 140193408. Its totient is φ = 12059520.

The previous prime is 45223429. The next prime is 45223523. The reversal of 45223440 is 4432254.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 45223440.

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, 93976 + ... + 94455.

Almost surely, 2^45223440 is an apocalyptic number.

45223440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45223440 is an abundant number, since it is smaller than the sum of its proper divisors (94969968).

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

45223440 is a wasteful number, since it uses less digits than its factorization.

45223440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188447 (or 188441 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 45223440 is about 6724.8375445062. The cubic root of 45223440 is about 356.2770641181.

Adding to 45223440 its reverse (4432254), we get a palindrome (49655694).

The spelling of 45223440 in words is "forty-five million, two hundred twenty-three thousand, four hundred forty".