1649147904 has 152 divisors (see below), whose sum is σ = 4907326320. Its totient is φ = 547356672.

The previous prime is 1649147887. The next prime is 1649147923. The reversal of 1649147904 is 4097419461.

It is a self number, because there is not a number n which added to its sum of digits gives 1649147904.

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, 7077772 + ... + 7078004.

Almost surely, 2^1649147904 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 1649147904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2453663160).

1649147904 is an abundant number, since it is smaller than the sum of its proper divisors (3258178416).

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

1649147904 is an frugal number, since it uses more digits than its factorization.

1649147904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1649147904 is about 40609.7020919878. The cubic root of 1649147904 is about 1181.4623027834.

The spelling of 1649147904 in words is "one billion, six hundred forty-nine million, one hundred forty-seven thousand, nine hundred four".