145709690 has 32 divisors (see below), whose sum is σ = 300188160. Its totient is φ = 49883904.

The previous prime is 145709687. The next prime is 145709693. The reversal of 145709690 is 96907541.

It is an interprime number because it is at equal distance from previous prime (145709687) and next prime (145709693).

It is a super-2 number, since 2×145709690² = 42462627519792200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145709693) 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, 69599 + ... + 71661.

It is an arithmetic number, because the mean of its divisors is an integer number (9380880).

Almost surely, 2^145709690 is an apocalyptic number.

145709690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145709690 is an abundant number, since it is smaller than the sum of its proper divisors (154478470).

145709690 is a wasteful number, since it uses less digits than its factorization.

145709690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3086.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 145709690 is about 12071.0268825813. The cubic root of 145709690 is about 526.2145004574.

The spelling of 145709690 in words is "one hundred forty-five million, seven hundred nine thousand, six hundred ninety".