400864357 has 2 divisors, whose sum is σ = 400864358. Its totient is φ = 400864356.

The previous prime is 400864351. The next prime is 400864391. The reversal of 400864357 is 753468004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310252996 + 90611361 = 17614^2 + 9519^2 .

It is a cyclic number.

It is not a de Polignac number, because 400864357 - 2¹⁵ = 400831589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400864351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200432178 + 200432179.

It is an arithmetic number, because the mean of its divisors is an integer number (200432179).

Almost surely, 2^400864357 is an apocalyptic number.

It is an amenable number.

400864357 is a deficient number, since it is larger than the sum of its proper divisors (1).

400864357 is an equidigital number, since it uses as much as digits as its factorization.

400864357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 400864357 is about 20021.5972639547. The cubic root of 400864357 is about 737.3366376459.

The spelling of 400864357 in words is "four hundred million, eight hundred sixty-four thousand, three hundred fifty-seven".