145867890 has 32 divisors (see below), whose sum is σ = 400095360. Its totient is φ = 33341184.

The previous prime is 145867877. The next prime is 145867907. The reversal of 145867890 is 98768541.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 347095 + ... + 347514.

It is an arithmetic number, because the mean of its divisors is an integer number (12502980).

Almost surely, 2^145867890 is an apocalyptic number.

145867890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145867890 is an abundant number, since it is smaller than the sum of its proper divisors (254227470).

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

145867890 is a wasteful number, since it uses less digits than its factorization.

145867890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694626.

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 145867890 is about 12077.5779856725. The cubic root of 145867890 is about 526.4048722037.

The spelling of 145867890 in words is "one hundred forty-five million, eight hundred sixty-seven thousand, eight hundred ninety".