2780370684 has 240 divisors, whose sum is σ = 9012459456. Its totient is φ = 727833600.

The previous prime is 2780370673. The next prime is 2780370731. The reversal of 2780370684 is 4860730872.

It is a happy number.

2780370684 is a `hidden beast` number, since 278 + 0 + 370 + 6 + 8 + 4 = 666.

It is a super-2 number, since 2×2780370684² = 15460922280893255712, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5336344 + ... + 5336864.

Almost surely, 2^2780370684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2780370684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4506229728).

2780370684 is an abundant number, since it is smaller than the sum of its proper divisors (6232088772).

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

2780370684 is a wasteful number, since it uses less digits than its factorization.

2780370684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 2780370684 is about 52729.2204000780. The cubic root of 2780370684 is about 1406.1583611751.

The spelling of 2780370684 in words is "two billion, seven hundred eighty million, three hundred seventy thousand, six hundred eighty-four".