19406142 has 80 divisors (see below), whose sum is σ = 50471520. Its totient is φ = 5458752.

The previous prime is 19406131. The next prime is 19406171. The reversal of 19406142 is 24160491.

19406142 is a `hidden beast` number, since 1 + 9 + 40 + 614 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 123528 + ... + 123684.

It is an arithmetic number, because the mean of its divisors is an integer number (630894).

Almost surely, 2^19406142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19406142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25235760).

19406142 is an abundant number, since it is smaller than the sum of its proper divisors (31065378).

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

19406142 is a wasteful number, since it uses less digits than its factorization.

19406142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 19406142 is about 4405.2402885654. The cubic root of 19406142 is about 268.7280918143.

The spelling of 19406142 in words is "nineteen million, four hundred six thousand, one hundred forty-two".