45216240 has 40 divisors (see below), whose sum is σ = 140171088. Its totient is φ = 12057600.

The previous prime is 45216221. The next prime is 45216247. The reversal of 45216240 is 4261254.

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 45216240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45216247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93961 + ... + 94440.

Almost surely, 2^45216240 is an apocalyptic number.

45216240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45216240 is an abundant number, since it is smaller than the sum of its proper divisors (94954848).

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

45216240 is a wasteful number, since it uses less digits than its factorization.

45216240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188417 (or 188411 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 45216240 is about 6724.3021942801. The cubic root of 45216240 is about 356.2581555535.

Adding to 45216240 its reverse (4261254), we get a palindrome (49477494).

The spelling of 45216240 in words is "forty-five million, two hundred sixteen thousand, two hundred forty".