145690490 has 64 divisors (see below), whose sum is σ = 299376000. Its totient is φ = 50561280.

The previous prime is 145690477. The next prime is 145690511. The reversal of 145690490 is 94096541.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347501 + ... + 347919.

It is an arithmetic number, because the mean of its divisors is an integer number (4677750).

Almost surely, 2^145690490 is an apocalyptic number.

145690490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145690490 is an abundant number, since it is smaller than the sum of its proper divisors (153685510).

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

145690490 is a wasteful number, since it uses less digits than its factorization.

145690490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 145690490 is about 12070.2315636445. The cubic root of 145690490 is about 526.1913865469.

The spelling of 145690490 in words is "one hundred forty-five million, six hundred ninety thousand, four hundred ninety".