208840742 has 32 divisors (see below), whose sum is σ = 365143680. Its totient is φ = 88577280.

The previous prime is 208840739. The next prime is 208840763. The reversal of 208840742 is 247048802.

It is a super-2 number, since 2×208840742² = 87228911038221128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24278 + ... + 31734.

It is an arithmetic number, because the mean of its divisors is an integer number (11410740).

Almost surely, 2^208840742 is an apocalyptic number.

208840742 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

208840742 is a deficient number, since it is larger than the sum of its proper divisors (156302938).

208840742 is a wasteful number, since it uses less digits than its factorization.

208840742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7556.

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 208840742 is about 14451.3231920126. The cubic root of 208840742 is about 593.2964401446.

The spelling of 208840742 in words is "two hundred eight million, eight hundred forty thousand, seven hundred forty-two".