400137480 has 48 divisors (see below), whose sum is σ = 1300447980. Its totient is φ = 106703232.

The previous prime is 400137433. The next prime is 400137487. The reversal of 400137480 is 84731004.

It can be written as a sum of positive squares in 2 ways, for example, as 367028964 + 33108516 = 19158^2 + 5754^2 .

It is a super-2 number, since 2×400137480² = 320220005801500800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400137487) 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, 555387 + ... + 556106.

Almost surely, 2^400137480 is an apocalyptic number.

400137480 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400137480 is an abundant number, since it is smaller than the sum of its proper divisors (900310500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400137480 is a wasteful number, since it uses less digits than its factorization.

400137480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111510 (or 1111503 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 400137480 is about 20003.4367047265. The cubic root of 400137480 is about 736.8907035007.

Adding to 400137480 its reverse (84731004), we get a palindrome (484868484).

The spelling of 400137480 in words is "four hundred million, one hundred thirty-seven thousand, four hundred eighty".