1649894792 has 128 divisors (see below), whose sum is σ = 4050950400. Its totient is φ = 611712000.

The previous prime is 1649894783. The next prime is 1649894801. The reversal of 1649894792 is 2974989461.

It is an interprime number because it is at equal distance from previous prime (1649894783) and next prime (1649894801).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1396442 + ... + 1397622.

It is an arithmetic number, because the mean of its divisors is an integer number (31648050).

Almost surely, 2^1649894792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1649894792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2025475200).

1649894792 is an abundant number, since it is smaller than the sum of its proper divisors (2401055608).

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

1649894792 is a wasteful number, since it uses less digits than its factorization.

1649894792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327 (or 1323 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 59.

The square root of 1649894792 is about 40618.8969815774. The cubic root of 1649894792 is about 1181.6406346427.

The spelling of 1649894792 in words is "one billion, six hundred forty-nine million, eight hundred ninety-four thousand, seven hundred ninety-two".