65404988 has 24 divisors (see below), whose sum is σ = 125091120. Its totient is φ = 29675520.

The previous prime is 65404951. The next prime is 65405023. The reversal of 65404988 is 88940456.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32870 + ... + 34802.

It is an arithmetic number, because the mean of its divisors is an integer number (5212130).

Almost surely, 2^65404988 is an apocalyptic number.

It is an amenable number.

65404988 is a deficient number, since it is larger than the sum of its proper divisors (59686132).

65404988 is a wasteful number, since it uses less digits than its factorization.

65404988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2717 (or 2715 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 65404988 is about 8087.3350369575. The cubic root of 65404988 is about 402.9058966244.

The spelling of 65404988 in words is "sixty-five million, four hundred four thousand, nine hundred eighty-eight".