45402144 has 24 divisors (see below), whose sum is σ = 119180880. Its totient is φ = 15134016.

The previous prime is 45402143. The next prime is 45402151. The reversal of 45402144 is 44120454.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×45402144² = 4122709359593472, which contains 22 as substring.

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

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236374 + ... + 236565.

It is an arithmetic number, because the mean of its divisors is an integer number (4965870).

Almost surely, 2^45402144 is an apocalyptic number.

It is an amenable number.

45402144 is an abundant number, since it is smaller than the sum of its proper divisors (73778736).

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

45402144 is a wasteful number, since it uses less digits than its factorization.

45402144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472952 (or 472944 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 45402144 is about 6738.1113080744. Note that the first 3 decimals coincide. The cubic root of 45402144 is about 356.7457329977.

Adding to 45402144 its reverse (44120454), we get a palindrome (89522598).

The spelling of 45402144 in words is "forty-five million, four hundred two thousand, one hundred forty-four".