19049640 has 32 divisors (see below), whose sum is σ = 57149280. Its totient is φ = 5079872.

The previous prime is 19049633. The next prime is 19049651. The reversal of 19049640 is 4694091.

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, 79254 + ... + 79493.

It is an arithmetic number, because the mean of its divisors is an integer number (1785915).

Almost surely, 2^19049640 is an apocalyptic number.

19049640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19049640 is an abundant number, since it is smaller than the sum of its proper divisors (38099640).

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

19049640 is a wasteful number, since it uses less digits than its factorization.

19049640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158761 (or 158757 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 19049640 is about 4364.5893277604. The cubic root of 19049640 is about 267.0723478004.

The spelling of 19049640 in words is "nineteen million, forty-nine thousand, six hundred forty".