38400890 has 16 divisors (see below), whose sum is σ = 75405600. Its totient is φ = 13963920.

The previous prime is 38400889. The next prime is 38400899. The reversal of 38400890 is 9800483.

It is not an unprimeable number, because it can be changed into a prime (38400899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174440 + ... + 174659.

It is an arithmetic number, because the mean of its divisors is an integer number (4712850).

Almost surely, 2^38400890 is an apocalyptic number.

38400890 is a deficient number, since it is larger than the sum of its proper divisors (37004710).

38400890 is a wasteful number, since it uses less digits than its factorization.

38400890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349117.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 38400890 is about 6196.8451650820. The cubic root of 38400890 is about 337.3756725418.

The spelling of 38400890 in words is "thirty-eight million, four hundred thousand, eight hundred ninety".