647985030 has 64 divisors (see below), whose sum is σ = 1938912768. Its totient is φ = 134645760.

The previous prime is 647985007. The next prime is 647985031. The reversal of 647985030 is 30589746.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647985031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137947 + ... + 142566.

It is an arithmetic number, because the mean of its divisors is an integer number (30295512).

Almost surely, 2^647985030 is an apocalyptic number.

647985030 is an abundant number, since it is smaller than the sum of its proper divisors (1290927738).

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

647985030 is a wasteful number, since it uses less digits than its factorization.

647985030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280541.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 647985030 is about 25455.5500824476. The cubic root of 647985030 is about 865.3430784059.

The spelling of 647985030 in words is "six hundred forty-seven million, nine hundred eighty-five thousand, thirty".