772803990 has 120 divisors (see below), whose sum is σ = 2417370912. Its totient is φ = 176631840.

The previous prime is 772803961. The next prime is 772804001. The reversal of 772803990 is 99308277.

It is a super-3 number, since 3×772803990³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 29955 + ... + 49425.

Almost surely, 2^772803990 is an apocalyptic number.

772803990 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 772803990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208685456).

772803990 is an abundant number, since it is smaller than the sum of its proper divisors (1644566922).

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

772803990 is a wasteful number, since it uses less digits than its factorization.

772803990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19504 (or 19488 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 772803990 is about 27799.3523305850. The cubic root of 772803990 is about 917.6768694849.

The spelling of 772803990 in words is "seven hundred seventy-two million, eight hundred three thousand, nine hundred ninety".