64249770 has 32 divisors (see below), whose sum is σ = 166061952. Its totient is φ = 15815232.

The previous prime is 64249769. The next prime is 64249813. The reversal of 64249770 is 7794246.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

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, 81982 + ... + 82761.

It is an arithmetic number, because the mean of its divisors is an integer number (5189436).

Almost surely, 2^64249770 is an apocalyptic number.

64249770 is an abundant number, since it is smaller than the sum of its proper divisors (101812182).

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

64249770 is a wasteful number, since it uses less digits than its factorization.

64249770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164766.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 64249770 is about 8015.5954239220. The cubic root of 64249770 is about 400.5196787094.

The spelling of 64249770 in words is "sixty-four million, two hundred forty-nine thousand, seven hundred seventy".