1985089386 has 32 divisors (see below), whose sum is σ = 4546073088. Its totient is φ = 566077680.

The previous prime is 1985089339. The next prime is 1985089409. The reversal of 1985089386 is 6839805891.

It is a super-3 number, since 3×1985089386³ (a number of 29 digits) contains 333 as substring.

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, 23220 + ... + 67151.

It is an arithmetic number, because the mean of its divisors is an integer number (142064784).

Almost surely, 2^1985089386 is an apocalyptic number.

1985089386 is an abundant number, since it is smaller than the sum of its proper divisors (2560983702).

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

1985089386 is a wasteful number, since it uses less digits than its factorization.

1985089386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90906.

The product of its (nonzero) digits is 3732480, while the sum is 57.

The square root of 1985089386 is about 44554.3419432944. The cubic root of 1985089386 is about 1256.7822038288.

The spelling of 1985089386 in words is "one billion, nine hundred eighty-five million, eighty-nine thousand, three hundred eighty-six".