2644970040 has 48 divisors (see below), whose sum is σ = 8596153800. Its totient is φ = 705325248.

The previous prime is 2644970039. The next prime is 2644970057. The reversal of 2644970040 is 400794462.

2644970040 is a `hidden beast` number, since 2 + 644 + 9 + 7 + 0 + 0 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2644969977 and 2644970004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3673210 + ... + 3673929.

Almost surely, 2^2644970040 is an apocalyptic number.

2644970040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2644970040 is an abundant number, since it is smaller than the sum of its proper divisors (5951183760).

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

2644970040 is a wasteful number, since it uses less digits than its factorization.

2644970040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7347156 (or 7347149 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 2644970040 is about 51429.2722095112. The cubic root of 2644970040 is about 1382.9514023104.

The spelling of 2644970040 in words is "two billion, six hundred forty-four million, nine hundred seventy thousand, forty".