630141978 has 16 divisors (see below), whose sum is σ = 1260638496. Its totient is φ = 209988240.

The previous prime is 630141943. The next prime is 630141979. The reversal of 630141978 is 879141036.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (630141979) 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, 12093 + ... + 37503.

It is an arithmetic number, because the mean of its divisors is an integer number (78789906).

Almost surely, 2^630141978 is an apocalyptic number.

630141978 is an abundant number, since it is smaller than the sum of its proper divisors (630496518).

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

630141978 is a wasteful number, since it uses less digits than its factorization.

630141978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29549.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 630141978 is about 25102.6289061524. The cubic root of 630141978 is about 857.3262814517.

The spelling of 630141978 in words is "six hundred thirty million, one hundred forty-one thousand, nine hundred seventy-eight".