45320240 has 40 divisors (see below), whose sum is σ = 120423840. Its totient is φ = 15538176.

The previous prime is 45320221. The next prime is 45320251. The reversal of 45320240 is 4202354.

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 (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39905 + ... + 41024.

It is an arithmetic number, because the mean of its divisors is an integer number (3010596).

Almost surely, 2^45320240 is an apocalyptic number.

45320240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45320240 is an abundant number, since it is smaller than the sum of its proper divisors (75103600).

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

45320240 is a wasteful number, since it uses less digits than its factorization.

45320240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80949 (or 80943 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 45320240 is about 6732.0308971365. The cubic root of 45320240 is about 356.5310846165.

Adding to 45320240 its reverse (4202354), we get a palindrome (49522594).

The spelling of 45320240 in words is "forty-five million, three hundred twenty thousand, two hundred forty".