1915954404 has 96 divisors (see below), whose sum is σ = 5568783360. Its totient is φ = 499195008.

The previous prime is 1915954393. The next prime is 1915954409. The reversal of 1915954404 is 4044595191.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1915954409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80067 + ... + 101205.

It is an arithmetic number, because the mean of its divisors is an integer number (58008160).

Almost surely, 2^1915954404 is an apocalyptic number.

1915954404 is a gapful number since it is divisible by the number (14) 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 1915954404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2784391680).

1915954404 is an abundant number, since it is smaller than the sum of its proper divisors (3652828956).

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

1915954404 is a wasteful number, since it uses less digits than its factorization.

1915954404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21249 (or 21247 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 1915954404 is about 43771.6164197760. The cubic root of 1915954404 is about 1242.0194296840.

It can be divided in two parts, 191 and 5954404, that added together give a palindrome (5954595).

The spelling of 1915954404 in words is "one billion, nine hundred fifteen million, nine hundred fifty-four thousand, four hundred four".