400787453 has 12 divisors (see below), whose sum is σ = 455729820. Its totient is φ = 351785280.

The previous prime is 400787399. The next prime is 400787473. The reversal of 400787453 is 354787004.

It can be written as a sum of positive squares in 2 ways, for example, as 97574884 + 303212569 = 9878^2 + 17413^2 .

It is not a de Polignac number, because 400787453 - 2¹⁶ = 400721917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400787473) 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, 53600 + ... + 60617.

It is an arithmetic number, because the mean of its divisors is an integer number (37977485).

Almost surely, 2^400787453 is an apocalyptic number.

It is an amenable number.

400787453 is a deficient number, since it is larger than the sum of its proper divisors (54942367).

400787453 is a wasteful number, since it uses less digits than its factorization.

400787453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114268 (or 114257 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 400787453 is about 20019.6766457403. The cubic root of 400787453 is about 737.2894830725.

The spelling of 400787453 in words is "four hundred million, seven hundred eighty-seven thousand, four hundred fifty-three".