402478840247 has 12 divisors (see below), whose sum is σ = 452682337800. Its totient is φ = 357380783760.

The previous prime is 402478840237. The next prime is 402478840261. The reversal of 402478840247 is 742048874204.

It is not a de Polignac number, because 402478840247 - 2¹⁴ = 402478823863 is a prime.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 402478840195 and 402478840204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402478840237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38672372 + ... + 38682777.

It is an arithmetic number, because the mean of its divisors is an integer number (37723528150).

Almost surely, 2^402478840247 is an apocalyptic number.

402478840247 is a deficient number, since it is larger than the sum of its proper divisors (50203497553).

402478840247 is a wasteful number, since it uses less digits than its factorization.

402478840247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77355214 (or 77355203 counting only the distinct ones).

The product of its (nonzero) digits is 3211264, while the sum is 50.

The spelling of 402478840247 in words is "four hundred two billion, four hundred seventy-eight million, eight hundred forty thousand, two hundred forty-seven".