19023140 has 24 divisors (see below), whose sum is σ = 40114872. Its totient is φ = 7577600.

The previous prime is 19023107. The next prime is 19023149. The reversal of 19023140 is 4132091.

It can be written as a sum of positive squares in 4 ways, for example, as 6120676 + 12902464 = 2474^2 + 3592^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (19023149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3290 + ... + 6990.

It is an arithmetic number, because the mean of its divisors is an integer number (1671453).

Almost surely, 2^19023140 is an apocalyptic number.

19023140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19023140 is an abundant number, since it is smaller than the sum of its proper divisors (21091732).

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

19023140 is a wasteful number, since it uses less digits than its factorization.

19023140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3967 (or 3965 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 19023140 is about 4361.5524758966. The cubic root of 19023140 is about 266.9484486688.

The spelling of 19023140 in words is "nineteen million, twenty-three thousand, one hundred forty".