407847978 has 12 divisors (see below), whose sum is σ = 883670658. Its totient is φ = 135949320.

The previous prime is 407847971. The next prime is 407848009. The reversal of 407847978 is 879748704.

It can be written as a sum of positive squares in only one way, i.e., 308107809 + 99740169 = 17553^2 + 9987^2 .

It is not an unprimeable number, because it can be changed into a prime (407847971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11329093 + ... + 11329128.

Almost surely, 2^407847978 is an apocalyptic number.

407847978 is an abundant number, since it is smaller than the sum of its proper divisors (475822680).

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

407847978 is a wasteful number, since it uses less digits than its factorization.

407847978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22658229 (or 22658226 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The square root of 407847978 is about 20195.2464208784. The cubic root of 407847978 is about 741.5938242871.

The spelling of 407847978 in words is "four hundred seven million, eight hundred forty-seven thousand, nine hundred seventy-eight".