400570542 has 64 divisors (see below), whose sum is σ = 917199360. Its totient is φ = 129511872.

The previous prime is 400570523. The next prime is 400570543. The reversal of 400570542 is 245075004.

400570542 is a `hidden beast` number, since 40 + 0 + 570 + 54 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400570543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 387258 + ... + 388290.

It is an arithmetic number, because the mean of its divisors is an integer number (14331240).

Almost surely, 2^400570542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400570542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458599680).

400570542 is an abundant number, since it is smaller than the sum of its proper divisors (516628818).

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

400570542 is a wasteful number, since it uses less digits than its factorization.

400570542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254 (or 1248 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 400570542 is about 20014.2584674027. The cubic root of 400570542 is about 737.1564490849.

It can be divided in two parts, 4005 and 70542, that added together give a palindrome (74547).

The spelling of 400570542 in words is "four hundred million, five hundred seventy thousand, five hundred forty-two".