355640642 has 16 divisors (see below), whose sum is σ = 624540672. Its totient is φ = 148699680.

The previous prime is 355640627. The next prime is 355640657. The reversal of 355640642 is 246046553.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (355640627) and next prime (355640657).

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, 309218 + ... + 310365.

It is an arithmetic number, because the mean of its divisors is an integer number (39033792).

Almost surely, 2^355640642 is an apocalyptic number.

355640642 is a deficient number, since it is larger than the sum of its proper divisors (268900030).

355640642 is a wasteful number, since it uses less digits than its factorization.

355640642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619633.

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 355640642 is about 18858.4368917469. The cubic root of 355640642 is about 708.4955527641.

The spelling of 355640642 in words is "three hundred fifty-five million, six hundred forty thousand, six hundred forty-two".