64250390 has 16 divisors (see below), whose sum is σ = 115743600. Its totient is φ = 25679520.

The previous prime is 64250371. The next prime is 64250401. The reversal of 64250390 is 9305246.

It is a super-2 number, since 2×64250390² = 8256225230304200, which contains 22 as substring.

It is a congruent number.

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, 19460 + ... + 22520.

It is an arithmetic number, because the mean of its divisors is an integer number (7233975).

Almost surely, 2^64250390 is an apocalyptic number.

64250390 is a deficient number, since it is larger than the sum of its proper divisors (51493210).

64250390 is a wasteful number, since it uses less digits than its factorization.

64250390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5167.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 64250390 is about 8015.6340984354. The cubic root of 64250390 is about 400.5209670222.

The spelling of 64250390 in words is "sixty-four million, two hundred fifty thousand, three hundred ninety".