1949647380 has 192 divisors, whose sum is σ = 6295968000. Its totient is φ = 447455232.

The previous prime is 1949647367. The next prime is 1949647423. The reversal of 1949647380 is 837469491.

It is a super-2 number, since 2×1949647380² = 7602249812681728800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 560286 + ... + 563754.

It is an arithmetic number, because the mean of its divisors is an integer number (32791500).

Almost surely, 2^1949647380 is an apocalyptic number.

1949647380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1949647380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3147984000).

1949647380 is an abundant number, since it is smaller than the sum of its proper divisors (4346320620).

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

1949647380 is a wasteful number, since it uses less digits than its factorization.

1949647380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3546 (or 3544 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 1949647380 is about 44154.8115158473. The cubic root of 1949647380 is about 1249.2576669739.

The spelling of 1949647380 in words is "one billion, nine hundred forty-nine million, six hundred forty-seven thousand, three hundred eighty".