1894428807390 has 192 divisors, whose sum is σ = 6152555335680. Its totient is φ = 394394434560.

The previous prime is 1894428807389. The next prime is 1894428807433. The reversal of 1894428807390 is 937088244981.

1894428807390 is a `hidden beast` number, since 1 + 89 + 442 + 8 + 80 + 7 + 39 + 0 = 666.

It is a super-2 number, since 2×1894428807390² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2520960 + ... + 3184979.

It is an arithmetic number, because the mean of its divisors is an integer number (32044559040).

Almost surely, 2^{1894428807390} is an apocalyptic number.

1894428807390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1894428807390 is an abundant number, since it is smaller than the sum of its proper divisors (4258126528290).

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

1894428807390 is a wasteful number, since it uses less digits than its factorization.

1894428807390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5706007 (or 5706004 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 63.

The spelling of 1894428807390 in words is "one trillion, eight hundred ninety-four billion, four hundred twenty-eight million, eight hundred seven thousand, three hundred ninety".