1630778352 has 40 divisors (see below), whose sum is σ = 4814679936. Its totient is φ = 465936576.

The previous prime is 1630778351. The next prime is 1630778389. The reversal of 1630778352 is 2538770361.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630778351) 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, 2426418 + ... + 2427089.

Almost surely, 2^1630778352 is an apocalyptic number.

1630778352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1630778352 is an abundant number, since it is smaller than the sum of its proper divisors (3183901584).

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

1630778352 is a wasteful number, since it uses less digits than its factorization.

1630778352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853525 (or 4853519 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 1630778352 is about 40382.8967757391. The cubic root of 1630778352 is about 1177.0592173695.

The spelling of 1630778352 in words is "one billion, six hundred thirty million, seven hundred seventy-eight thousand, three hundred fifty-two".