145469490 has 32 divisors (see below), whose sum is σ = 349811136. Its totient is φ = 38715840.

The previous prime is 145469479. The next prime is 145469497. The reversal of 145469490 is 94964541.

It is a super-2 number, since 2×145469490² = 42322745041720200, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (145469497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11749 + ... + 20711.

It is an arithmetic number, because the mean of its divisors is an integer number (10931598).

Almost surely, 2^145469490 is an apocalyptic number.

145469490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145469490 is an abundant number, since it is smaller than the sum of its proper divisors (204341646).

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

145469490 is a wasteful number, since it uses less digits than its factorization.

145469490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9514.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 145469490 is about 12061.0733353214. The cubic root of 145469490 is about 525.9251894743.

The spelling of 145469490 in words is "one hundred forty-five million, four hundred sixty-nine thousand, four hundred ninety".