145533890 has 16 divisors (see below), whose sum is σ = 270994680. Its totient is φ = 56206080.

The previous prime is 145533877. The next prime is 145533911. The reversal of 145533890 is 98335541.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 70174129 + 75359761 = 8377^2 + 8681^2 .

It is a super-2 number, since 2×145533890² = 42360226277064200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250631 + ... + 251210.

Almost surely, 2^145533890 is an apocalyptic number.

145533890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145533890 is a deficient number, since it is larger than the sum of its proper divisors (125460790).

145533890 is a wasteful number, since it uses less digits than its factorization.

145533890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501877.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 145533890 is about 12063.7427857195. The cubic root of 145533890 is about 526.0027878430.

The spelling of 145533890 in words is "one hundred forty-five million, five hundred thirty-three thousand, eight hundred ninety".