45404240 has 80 divisors (see below), whose sum is σ = 122135040. Its totient is φ = 15375360.

The previous prime is 45404239. The next prime is 45404257. The reversal of 45404240 is 4240454.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49385 + ... + 50295.

It is an arithmetic number, because the mean of its divisors is an integer number (1526688).

Almost surely, 2^45404240 is an apocalyptic number.

45404240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45404240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61067520).

45404240 is an abundant number, since it is smaller than the sum of its proper divisors (76730800).

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

45404240 is a wasteful number, since it uses less digits than its factorization.

45404240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 1014 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 45404240 is about 6738.2668394773. The cubic root of 45404240 is about 356.7512226617.

Adding to 45404240 its reverse (4240454), we get a palindrome (49644694).

The spelling of 45404240 in words is "forty-five million, four hundred four thousand, two hundred forty".