40720988 has 96 divisors (see below), whose sum is σ = 94832640. Its totient is φ = 14837760.

The previous prime is 40720973. The next prime is 40720991. The reversal of 40720988 is 88902704.

It is a super-2 number, since 2×40720988² = 3316397727392288, which contains 22 as substring.

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, 419756 + ... + 419852.

It is an arithmetic number, because the mean of its divisors is an integer number (987840).

Almost surely, 2^40720988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40720988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47416320).

40720988 is an abundant number, since it is smaller than the sum of its proper divisors (54111652).

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

40720988 is a wasteful number, since it uses less digits than its factorization.

40720988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 40720988 is about 6381.2998675818. The cubic root of 40720988 is about 344.0377527522.

The spelling of 40720988 in words is "forty million, seven hundred twenty thousand, nine hundred eighty-eight".