45472440 has 128 divisors (see below), whose sum is σ = 148861440. Its totient is φ = 11045376.

The previous prime is 45472439. The next prime is 45472459. The reversal of 45472440 is 4427454.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 45472398 and 45472407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160539 + ... + 160821.

It is an arithmetic number, because the mean of its divisors is an integer number (1162980).

Almost surely, 2^45472440 is an apocalyptic number.

45472440 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 45472440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74430720).

45472440 is an abundant number, since it is smaller than the sum of its proper divisors (103389000).

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

45472440 is a wasteful number, since it uses less digits than its factorization.

45472440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 30.

The square root of 45472440 is about 6743.3255890547. The cubic root of 45472440 is about 356.9297541645.

Adding to 45472440 its reverse (4427454), we get a palindrome (49899894).

The spelling of 45472440 in words is "forty-five million, four hundred seventy-two thousand, four hundred forty".