40645488 has 80 divisors (see below), whose sum is σ = 115305120. Its totient is φ = 12260352.

The previous prime is 40645481. The next prime is 40645519. The reversal of 40645488 is 88454604.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40645481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32458 + ... + 33686.

It is an arithmetic number, because the mean of its divisors is an integer number (1441314).

Almost surely, 2^40645488 is an apocalyptic number.

40645488 is a gapful number since it is divisible by the number (48) 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 40645488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57652560).

40645488 is an abundant number, since it is smaller than the sum of its proper divisors (74659632).

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

40645488 is a wasteful number, since it uses less digits than its factorization.

40645488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

The square root of 40645488 is about 6375.3814003556. The cubic root of 40645488 is about 343.8249966174.

The spelling of 40645488 in words is "forty million, six hundred forty-five thousand, four hundred eighty-eight".