400124790 has 96 divisors (see below), whose sum is σ = 1169138880. Its totient is φ = 94203648.

The previous prime is 400124789. The next prime is 400124797. The reversal of 400124790 is 97421004.

It is a happy number.

It is a super-3 number, since 3×400124790³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400124797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19476 + ... + 34344.

It is an arithmetic number, because the mean of its divisors is an integer number (12178530).

Almost surely, 2^400124790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400124790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (584569440).

400124790 is an abundant number, since it is smaller than the sum of its proper divisors (769014090).

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

400124790 is a wasteful number, since it uses less digits than its factorization.

400124790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14918 (or 14915 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 400124790 is about 20003.1195067169. The cubic root of 400124790 is about 736.8829134766.

Adding to 400124790 its reverse (97421004), we get a palindrome (497545794).

The spelling of 400124790 in words is "four hundred million, one hundred twenty-four thousand, seven hundred ninety".