400763503 has 24 divisors (see below), whose sum is σ = 475959120. Its totient is φ = 336389760.

The previous prime is 400763449. The next prime is 400763507. The reversal of 400763503 is 305367004.

It is not a de Polignac number, because 400763503 - 2²¹ = 398666351 is a prime.

It is a super-2 number, since 2×400763503² = 321222770673662018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400763507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 647128 + ... + 647746.

It is an arithmetic number, because the mean of its divisors is an integer number (19831630).

Almost surely, 2^400763503 is an apocalyptic number.

400763503 is a deficient number, since it is larger than the sum of its proper divisors (75195617).

400763503 is a wasteful number, since it uses less digits than its factorization.

400763503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 400763503 is about 20019.0784752945. The cubic root of 400763503 is about 737.2747966223.

The spelling of 400763503 in words is "four hundred million, seven hundred sixty-three thousand, five hundred three".