64940620 has 24 divisors (see below), whose sum is σ = 136818864. Its totient is φ = 25891776.

The previous prime is 64940593. The next prime is 64940633. The reversal of 64940620 is 2604946.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1219 + ... + 11461.

It is an arithmetic number, because the mean of its divisors is an integer number (5700786).

Almost surely, 2^64940620 is an apocalyptic number.

It is an amenable number.

64940620 is an abundant number, since it is smaller than the sum of its proper divisors (71878244).

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

64940620 is a wasteful number, since it uses less digits than its factorization.

64940620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10569 (or 10567 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 64940620 is about 8058.5743155970. The cubic root of 64940620 is about 401.9501023024.

The spelling of 64940620 in words is "sixty-four million, nine hundred forty thousand, six hundred twenty".