40400052 has 96 divisors (see below), whose sum is σ = 122701824. Its totient is φ = 10032000.

The previous prime is 40400033. The next prime is 40400053. The reversal of 40400052 is 25000404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400053) 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, 20302 + ... + 22202.

It is an arithmetic number, because the mean of its divisors is an integer number (1278144).

Almost surely, 2^40400052 is an apocalyptic number.

40400052 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40400052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61350912).

40400052 is an abundant number, since it is smaller than the sum of its proper divisors (82301772).

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

40400052 is a wasteful number, since it uses less digits than its factorization.

40400052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949 (or 1947 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 40400052 is about 6356.1035233860. The cubic root of 40400052 is about 343.1315415424.

Adding to 40400052 its reverse (25000404), we get a palindrome (65400456).

The spelling of 40400052 in words is "forty million, four hundred thousand, fifty-two".