42400744 has 8 divisors (see below), whose sum is σ = 79501410. Its totient is φ = 21200368.

The previous prime is 42400741. The next prime is 42400793. The reversal of 42400744 is 44700424.

It can be written as a sum of positive squares in only one way, i.e., 30580900 + 11819844 = 5530^2 + 3438^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (42400741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2650039 + ... + 2650054.

Almost surely, 2^42400744 is an apocalyptic number.

It is an amenable number.

42400744 is a deficient number, since it is larger than the sum of its proper divisors (37100666).

42400744 is a wasteful number, since it uses less digits than its factorization.

42400744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5300099 (or 5300095 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 25.

The square root of 42400744 is about 6511.5853676351. The cubic root of 42400744 is about 348.7047198228.

The spelling of 42400744 in words is "forty-two million, four hundred thousand, seven hundred forty-four".