38212890 has 32 divisors (see below), whose sum is σ = 95700096. Its totient is φ = 9746880.

The previous prime is 38212879. The next prime is 38212919. The reversal of 38212890 is 9821283.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 27001 + ... + 28380.

It is an arithmetic number, because the mean of its divisors is an integer number (2990628).

Almost surely, 2^38212890 is an apocalyptic number.

38212890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38212890 is an abundant number, since it is smaller than the sum of its proper divisors (57487206).

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

38212890 is a wasteful number, since it uses less digits than its factorization.

38212890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55414.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 38212890 is about 6181.6575447043. The cubic root of 38212890 is about 336.8242060244.

The spelling of 38212890 in words is "thirty-eight million, two hundred twelve thousand, eight hundred ninety".