400880479 has 2 divisors, whose sum is σ = 400880480. Its totient is φ = 400880478.

The previous prime is 400880423. The next prime is 400880489. The reversal of 400880479 is 974088004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400880479 - 2¹⁷ = 400749407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400880489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200440239 + 200440240.

It is an arithmetic number, because the mean of its divisors is an integer number (200440240).

Almost surely, 2^400880479 is an apocalyptic number.

400880479 is a deficient number, since it is larger than the sum of its proper divisors (1).

400880479 is an equidigital number, since it uses as much as digits as its factorization.

400880479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 400880479 is about 20021.9998751373. Note that the first 3 decimals coincide. The cubic root of 400880479 is about 737.3465222712.

The spelling of 400880479 in words is "four hundred million, eight hundred eighty thousand, four hundred seventy-nine".