40158720 has 320 divisors, whose sum is σ = 164989440. Its totient is φ = 9068544.

The previous prime is 40158719. The next prime is 40158739. The reversal of 40158720 is 2785104.

It is a tau number, because it is divible by the number of its divisors (320).

It is a super-2 number, since 2×40158720² = 3225445584076800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 483799 + ... + 483881.

It is an arithmetic number, because the mean of its divisors is an integer number (515592).

Almost surely, 2^40158720 is an apocalyptic number.

40158720 is a gapful number since it is divisible by the number (40) 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 40158720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82494720).

40158720 is an abundant number, since it is smaller than the sum of its proper divisors (124830720).

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

40158720 is an equidigital number, since it uses as much as digits as its factorization.

40158720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 40158720 is about 6337.0908151927. The cubic root of 40158720 is about 342.4469379854.

The spelling of 40158720 in words is "forty million, one hundred fifty-eight thousand, seven hundred twenty".