10402740 has 36 divisors (see below), whose sum is σ = 31555524. Its totient is φ = 2774016.

The previous prime is 10402699. The next prime is 10402741. The reversal of 10402740 is 4720401.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5788836 + 4613904 = 2406^2 + 2148^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10402741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28717 + ... + 29076.

Almost surely, 2^10402740 is an apocalyptic number.

10402740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10402740 is an abundant number, since it is smaller than the sum of its proper divisors (21152784).

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

10402740 is a wasteful number, since it uses less digits than its factorization.

10402740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57808 (or 57803 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 10402740 is about 3225.3278903082. The cubic root of 10402740 is about 218.2977442655.

The spelling of 10402740 in words is "ten million, four hundred two thousand, seven hundred forty".