40660398 has 24 divisors (see below), whose sum is σ = 88372128. Its totient is φ = 13511232.

The previous prime is 40660393. The next prime is 40660421. The reversal of 40660398 is 89306604.

40660398 is a `hidden beast` number, since 40 + 6 + 603 + 9 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40660393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2715 + ... + 9417.

It is an arithmetic number, because the mean of its divisors is an integer number (3682172).

Almost surely, 2^40660398 is an apocalyptic number.

40660398 is an abundant number, since it is smaller than the sum of its proper divisors (47711730).

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

40660398 is a wasteful number, since it uses less digits than its factorization.

40660398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7048 (or 7045 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 40660398 is about 6376.5506349436. The cubic root of 40660398 is about 343.8670332963.

The spelling of 40660398 in words is "forty million, six hundred sixty thousand, three hundred ninety-eight".