400801299340 has 192 divisors, whose sum is σ = 1013981068800. Its totient is φ = 131616866304.

The previous prime is 400801299329. The next prime is 400801299341. The reversal of 400801299340 is 43992108004.

It is a junction number, because it is equal to n+sod(n) for n = 400801299293 and 400801299302.

It is not an unprimeable number, because it can be changed into a prime (400801299341) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5991196 + ... + 6057724.

It is an arithmetic number, because the mean of its divisors is an integer number (5281151400).

Almost surely, 2^400801299340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400801299340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (506990534400).

400801299340 is an abundant number, since it is smaller than the sum of its proper divisors (613179769460).

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

400801299340 is a wasteful number, since it uses less digits than its factorization.

400801299340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66644 (or 66642 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 400801299340 in words is "four hundred billion, eight hundred one million, two hundred ninety-nine thousand, three hundred forty".