1549929420 has 108 divisors (see below), whose sum is σ = 5091021936. Its totient is φ = 381513600.

The previous prime is 1549929397. The next prime is 1549929421. The reversal of 1549929420 is 249299451.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1549929421) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4945 + ... + 55895.

It is an arithmetic number, because the mean of its divisors is an integer number (47139092).

Almost surely, 2^1549929420 is an apocalyptic number.

1549929420 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 1549929420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2545510968).

1549929420 is an abundant number, since it is smaller than the sum of its proper divisors (3541092516).

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

1549929420 is a wasteful number, since it uses less digits than its factorization.

1549929420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50992 (or 50974 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 1549929420 is about 39369.1429929583. The cubic root of 1549929420 is about 1157.2769610075.

The spelling of 1549929420 in words is "one billion, five hundred forty-nine million, nine hundred twenty-nine thousand, four hundred twenty".