1919435940 has 60 divisors (see below), whose sum is σ = 6021346716. Its totient is φ = 511849152.

The previous prime is 1919435923. The next prime is 1919435953. The reversal of 1919435940 is 495349191.

1919435940 is a `hidden beast` number, since 1 + 9 + 19 + 43 + 594 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 555167844 + 1364268096 = 23562^2 + 36936^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 590799 + ... + 594038.

Almost surely, 2^1919435940 is an apocalyptic number.

1919435940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1919435940 is an abundant number, since it is smaller than the sum of its proper divisors (4101910776).

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

1919435940 is a wasteful number, since it uses less digits than its factorization.

1919435940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184858 (or 1184847 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 1919435940 is about 43811.3677029147. The cubic root of 1919435940 is about 1242.7712775740.

The spelling of 1919435940 in words is "one billion, nine hundred nineteen million, four hundred thirty-five thousand, nine hundred forty".