400137274 has 16 divisors (see below), whose sum is σ = 633980160. Its totient is φ = 189110880.

The previous prime is 400137271. The next prime is 400137293. The reversal of 400137274 is 472731004.

It is not an unprimeable number, because it can be changed into a prime (400137271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72379 + ... + 77710.

It is an arithmetic number, because the mean of its divisors is an integer number (39623760).

Almost surely, 2^400137274 is an apocalyptic number.

400137274 is a deficient number, since it is larger than the sum of its proper divisors (233842886).

400137274 is a wasteful number, since it uses less digits than its factorization.

400137274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150165.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 400137274 is about 20003.4315556107. The cubic root of 400137274 is about 736.8905770446.

Adding to 400137274 its reverse (472731004), we get a palindrome (872868278).

The spelling of 400137274 in words is "four hundred million, one hundred thirty-seven thousand, two hundred seventy-four".