400606980309 has 40 divisors (see below), whose sum is σ = 630900563040. Its totient is φ = 252626835744.

The previous prime is 400606980299. The next prime is 400606980311. The reversal of 400606980309 is 903089606004.

400606980309 is a `hidden beast` number, since 4 + 0 + 0 + 606 + 9 + 8 + 0 + 30 + 9 = 666.

It is not a de Polignac number, because 400606980309 - 2¹⁵ = 400606947541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400606980349) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 805654 + ... + 1204280.

It is an arithmetic number, because the mean of its divisors is an integer number (15772514076).

Almost surely, 2^400606980309 is an apocalyptic number.

It is an amenable number.

400606980309 is a deficient number, since it is larger than the sum of its proper divisors (230293582731).

400606980309 is a wasteful number, since it uses less digits than its factorization.

400606980309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399311 (or 399302 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 400606980309 in words is "four hundred billion, six hundred six million, nine hundred eighty thousand, three hundred nine".