770031990 has 192 divisors, whose sum is σ = 2483260416. Its totient is φ = 161208576.

The previous prime is 770031989. The next prime is 770032001. The reversal of 770031990 is 99130077.

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 95 ways as a sum of consecutive naturals, for example, 1367449 + ... + 1368011.

It is an arithmetic number, because the mean of its divisors is an integer number (12933648).

Almost surely, 2^770031990 is an apocalyptic number.

770031990 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 770031990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1241630208).

770031990 is an abundant number, since it is smaller than the sum of its proper divisors (1713228426).

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

770031990 is a wasteful number, since it uses less digits than its factorization.

770031990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 11907, while the sum is 36.

The square root of 770031990 is about 27749.4502648251. The cubic root of 770031990 is about 916.5783383027.

The spelling of 770031990 in words is "seven hundred seventy million, thirty-one thousand, nine hundred ninety".