400080757 has 2 divisors, whose sum is σ = 400080758. Its totient is φ = 400080756.

The previous prime is 400080713. The next prime is 400080763. The reversal of 400080757 is 757080004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 396447921 + 3632836 = 19911^2 + 1906^2 .

It is a cyclic number.

It is not a de Polignac number, because 400080757 - 2¹¹ = 400078709 is a prime.

It is a super-2 number, since 2×400080757² = 320129224243386098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400080767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200040378 + 200040379.

It is an arithmetic number, because the mean of its divisors is an integer number (200040379).

Almost surely, 2^400080757 is an apocalyptic number.

It is an amenable number.

400080757 is a deficient number, since it is larger than the sum of its proper divisors (1).

400080757 is an equidigital number, since it uses as much as digits as its factorization.

400080757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 400080757 is about 20002.0188231088. The cubic root of 400080757 is about 736.8558816134.

The spelling of 400080757 in words is "four hundred million, eighty thousand, seven hundred fifty-seven".