45289840 has 40 divisors (see below), whose sum is σ = 105604848. Its totient is φ = 18063360.

The previous prime is 45289837. The next prime is 45289861. The reversal of 45289840 is 4898254.

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 (40).

It is a junction number, because it is equal to n+sod(n) for n = 45289793 and 45289802.

It is a congruent number.

It is an unprimeable number.

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, 38704 + ... + 39856.

Almost surely, 2^45289840 is an apocalyptic number.

45289840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45289840 is an abundant number, since it is smaller than the sum of its proper divisors (60315008).

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

45289840 is a wasteful number, since it uses less digits than its factorization.

45289840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657 (or 1651 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 45289840 is about 6729.7726558926. The cubic root of 45289840 is about 356.4513485772.

The spelling of 45289840 in words is "forty-five million, two hundred eighty-nine thousand, eight hundred forty".