40921968 has 80 divisors (see below), whose sum is σ = 111707136. Its totient is φ = 12883200.

The previous prime is 40921967. The next prime is 40921981. The reversal of 40921968 is 86912904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40921961) 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, 111321 + ... + 111687.

Almost surely, 2^40921968 is an apocalyptic number.

40921968 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 40921968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55853568).

40921968 is an abundant number, since it is smaller than the sum of its proper divisors (70785168).

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

40921968 is a wasteful number, since it uses less digits than its factorization.

40921968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 40921968 is about 6397.0280599666. The cubic root of 40921968 is about 344.6028279659.

The spelling of 40921968 in words is "forty million, nine hundred twenty-one thousand, nine hundred sixty-eight".