190923440 has 40 divisors (see below), whose sum is σ = 454228368. Its totient is φ = 74592000.

The previous prime is 190923433. The next prime is 190923449. The reversal of 190923440 is 44329091.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 190923397 and 190923406.

It is not an unprimeable number, because it can be changed into a prime (190923449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24311 + ... + 31190.

Almost surely, 2^190923440 is an apocalyptic number.

190923440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190923440 is an abundant number, since it is smaller than the sum of its proper divisors (263304928).

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

190923440 is a wasteful number, since it uses less digits than its factorization.

190923440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55557 (or 55551 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 190923440 is about 13817.5048398761. The cubic root of 190923440 is about 575.8195647541.

The spelling of 190923440 in words is "one hundred ninety million, nine hundred twenty-three thousand, four hundred forty".