1649947312 has 40 divisors (see below), whose sum is σ = 3476808720. Its totient is φ = 753964800.

The previous prime is 1649947303. The next prime is 1649947333. The reversal of 1649947312 is 2137499461.

It is a super-2 number, since 2×1649947312² = 5444652264752050688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18262 + ... + 60277.

It is an arithmetic number, because the mean of its divisors is an integer number (86920218).

Almost surely, 2^1649947312 is an apocalyptic number.

It is an amenable number.

1649947312 is an abundant number, since it is smaller than the sum of its proper divisors (1826861408).

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

1649947312 is a wasteful number, since it uses less digits than its factorization.

1649947312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78661 (or 78655 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 1649947312 is about 40619.5434735547. The cubic root of 1649947312 is about 1181.6531726356.

The spelling of 1649947312 in words is "one billion, six hundred forty-nine million, nine hundred forty-seven thousand, three hundred twelve".