400885140 has 24 divisors (see below), whose sum is σ = 1122478560. Its totient is φ = 106902688.

The previous prime is 400885129. The next prime is 400885141. The reversal of 400885140 is 41588004.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 400885098 and 400885107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400885141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3340650 + ... + 3340769.

It is an arithmetic number, because the mean of its divisors is an integer number (46769940).

Almost surely, 2^400885140 is an apocalyptic number.

It is an amenable number.

400885140 is an abundant number, since it is smaller than the sum of its proper divisors (721593420).

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

400885140 is a wasteful number, since it uses less digits than its factorization.

400885140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6681431 (or 6681429 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 400885140 is about 20022.1162717631. The cubic root of 400885140 is about 737.3493799466.

The spelling of 400885140 in words is "four hundred million, eight hundred eighty-five thousand, one hundred forty".