395007690 has 128 divisors (see below), whose sum is σ = 1187923968. Its totient is φ = 81665280.

The previous prime is 395007661. The next prime is 395007709. The reversal of 395007690 is 96700593.

It is a super-2 number, since 2×395007690² = 312062150318272200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 708892 + ... + 709448.

It is an arithmetic number, because the mean of its divisors is an integer number (9280656).

Almost surely, 2^395007690 is an apocalyptic number.

395007690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 395007690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (593961984).

395007690 is an abundant number, since it is smaller than the sum of its proper divisors (792916278).

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

395007690 is a wasteful number, since it uses less digits than its factorization.

395007690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892.

The product of its (nonzero) digits is 51030, while the sum is 39.

The square root of 395007690 is about 19874.8003763560. The cubic root of 395007690 is about 733.7281535557.

The spelling of 395007690 in words is "three hundred ninety-five million, seven thousand, six hundred ninety".