64770992 has 40 divisors (see below), whose sum is σ = 147438480. Its totient is φ = 27175680.

The previous prime is 64770991. The next prime is 64771001. The reversal of 64770992 is 29907746.

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

It is not an unprimeable number, because it can be changed into a prime (64770991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11867 + ... + 16442.

It is an arithmetic number, because the mean of its divisors is an integer number (3685962).

Almost surely, 2^64770992 is an apocalyptic number.

It is an amenable number.

64770992 is an abundant number, since it is smaller than the sum of its proper divisors (82667488).

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

64770992 is a wasteful number, since it uses less digits than its factorization.

64770992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28341 (or 28335 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 64770992 is about 8048.0427434253. The cubic root of 64770992 is about 401.5998261932.

The spelling of 64770992 in words is "sixty-four million, seven hundred seventy thousand, nine hundred ninety-two".