1390194252 has 84 divisors (see below), whose sum is σ = 3680743080. Its totient is φ = 459188352.

The previous prime is 1390194241. The next prime is 1390194259. The reversal of 1390194252 is 2524910931.

1390194252 is a `hidden beast` number, since 1 + 390 + 19 + 4 + 252 = 666.

1390194252 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1390194259) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 327399 + ... + 331617.

It is an arithmetic number, because the mean of its divisors is an integer number (43818370).

Almost surely, 2^1390194252 is an apocalyptic number.

1390194252 is a gapful number since it is divisible by the number (12) 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 1390194252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1840371540).

1390194252 is an abundant number, since it is smaller than the sum of its proper divisors (2290548828).

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

1390194252 is a wasteful number, since it uses less digits than its factorization.

1390194252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4354 (or 4337 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1390194252 is about 37285.3087958247. The cubic root of 1390194252 is about 1116.0710152520.

The spelling of 1390194252 in words is "one billion, three hundred ninety million, one hundred ninety-four thousand, two hundred fifty-two".