1919000040 has 64 divisors (see below), whose sum is σ = 5760201600. Its totient is φ = 511448832.

The previous prime is 1919000029. The next prime is 1919000047. The reversal of 1919000040 is 400009191.

It is a super-2 number, since 2×1919000040² = 7365122307040003200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1919000047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297166 + ... + 303554.

It is an arithmetic number, because the mean of its divisors is an integer number (90003150).

Almost surely, 2^1919000040 is an apocalyptic number.

1919000040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1919000040 is an abundant number, since it is smaller than the sum of its proper divisors (3841201560).

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

1919000040 is a wasteful number, since it uses less digits than its factorization.

1919000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8906 (or 8902 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1919000040 is about 43806.3926841734. The cubic root of 1919000040 is about 1242.6771935080.

The spelling of 1919000040 in words is "one billion, nine hundred nineteen million, forty", and thus it is an aban number.