10639740 has 48 divisors (see below), whose sum is σ = 29933568. Its totient is φ = 2823744.

The previous prime is 10639729. The next prime is 10639747. The reversal of 10639740 is 4793601.

It is a happy number.

10639740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×10639740² = 226408134535200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 10639698 and 10639707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10639747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22749 + ... + 23211.

It is an arithmetic number, because the mean of its divisors is an integer number (623616).

Almost surely, 2^10639740 is an apocalyptic number.

10639740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10639740 is an abundant number, since it is smaller than the sum of its proper divisors (19293828).

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

10639740 is a wasteful number, since it uses less digits than its factorization.

10639740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 10639740 is about 3261.8614317595. The cubic root of 10639740 is about 219.9430982316.

The spelling of 10639740 in words is "ten million, six hundred thirty-nine thousand, seven hundred forty".