145522390 has 16 divisors (see below), whose sum is σ = 282089808. Its totient is φ = 53731296.

The previous prime is 145522373. The next prime is 145522411. The reversal of 145522390 is 93225541.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559572 + ... + 559831.

It is an arithmetic number, because the mean of its divisors is an integer number (17630613).

Almost surely, 2^145522390 is an apocalyptic number.

145522390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145522390 is a deficient number, since it is larger than the sum of its proper divisors (136567418).

145522390 is a wasteful number, since it uses less digits than its factorization.

145522390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119423.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 145522390 is about 12063.2661414726. The cubic root of 145522390 is about 525.9889326706.

The spelling of 145522390 in words is "one hundred forty-five million, five hundred twenty-two thousand, three hundred ninety".