770002649 has 8 divisors (see below), whose sum is σ = 829770312. Its totient is φ = 710311680.

The previous prime is 770002627. The next prime is 770002657. The reversal of 770002649 is 946200077.

It can be written as a sum of positive squares in 4 ways, for example, as 12652249 + 757350400 = 3557^2 + 27520^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 770002649 - 2²⁴ = 753225433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (770002699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2609 + ... + 39329.

It is an arithmetic number, because the mean of its divisors is an integer number (103721289).

Almost surely, 2^770002649 is an apocalyptic number.

It is an amenable number.

770002649 is a deficient number, since it is larger than the sum of its proper divisors (59767663).

770002649 is a wasteful number, since it uses less digits than its factorization.

770002649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38347.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 770002649 is about 27748.9215826489. The cubic root of 770002649 is about 916.5666965064.

The spelling of 770002649 in words is "seven hundred seventy million, two thousand, six hundred forty-nine".