40858128 has 80 divisors (see below), whose sum is σ = 118048000. Its totient is φ = 13530240.

The previous prime is 40858091. The next prime is 40858163. The reversal of 40858128 is 82185804.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 40858092 and 40858101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116898 + ... + 117246.

It is an arithmetic number, because the mean of its divisors is an integer number (1475600).

Almost surely, 2^40858128 is an apocalyptic number.

40858128 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 40858128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59024000).

40858128 is an abundant number, since it is smaller than the sum of its proper divisors (77189872).

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

40858128 is a wasteful number, since it uses less digits than its factorization.

40858128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 625 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 40858128 is about 6392.0362952662. The cubic root of 40858128 is about 344.4235363730.

The spelling of 40858128 in words is "forty million, eight hundred fifty-eight thousand, one hundred twenty-eight".