776451420 has 120 divisors (see below), whose sum is σ = 2514492288. Its totient is φ = 200361600.

The previous prime is 776451419. The next prime is 776451443. The reversal of 776451420 is 24154677.

776451420 is a `hidden beast` number, since 7 + 7 + 645 + 1 + 4 + 2 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 42490 + ... + 57950.

Almost surely, 2^776451420 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 776451420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1257246144).

776451420 is an abundant number, since it is smaller than the sum of its proper divisors (1738040868).

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

776451420 is a wasteful number, since it uses less digits than its factorization.

776451420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15513 (or 15502 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 776451420 is about 27864.8778931471. The cubic root of 776451420 is about 919.1183346109.

The spelling of 776451420 in words is "seven hundred seventy-six million, four hundred fifty-one thousand, four hundred twenty".