1649391952 has 160 divisors (see below), whose sum is σ = 3863752704. Its totient is φ = 674611200.

The previous prime is 1649391949. The next prime is 1649391967. The reversal of 1649391952 is 2591939461.

It is a super-2 number, since 2×1649391952² = 5440987622644740608, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1649391896 and 1649391905.

It is a congruent number.

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, 4494073 + ... + 4494439.

Almost surely, 2^1649391952 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 1649391952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1931876352).

1649391952 is an abundant number, since it is smaller than the sum of its proper divisors (2214360752).

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

1649391952 is a wasteful number, since it uses less digits than its factorization.

1649391952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 471 counting only the distinct ones).

The product of its digits is 524880, while the sum is 49.

The square root of 1649391952 is about 40612.7067800214. The cubic root of 1649391952 is about 1181.5205791999.

The spelling of 1649391952 in words is "one billion, six hundred forty-nine million, three hundred ninety-one thousand, nine hundred fifty-two".