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986999390 = 251331534621
BaseRepresentation
bin111010110101000…
…110101001011110
32112210012202121222
4322311012221132
54010132440030
6241534453342
733313233146
oct7265065136
92483182558
10986999390
11467154283
12236664252
13129637910
1495125926
155b9b43e5

986999390 has 64 divisors (see below), whose sum is σ = 2012677632. Its totient is φ = 345945600.

The previous prime is 986999381. The next prime is 986999401. The reversal of 986999390 is 93999689.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a fibodiv number, since the Fibonacci-like sequence with seeds 986 and 999390 contains 986999390 itself.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211280 + ... + 215900.

It is an arithmetic number, because the mean of its divisors is an integer number (31448088).

Almost surely, 2986999390 is an apocalyptic number.

986999390 is an abundant number, since it is smaller than the sum of its proper divisors (1025678242).

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

986999390 is a wasteful number, since it uses less digits than its factorization.

986999390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4725.

The product of its (nonzero) digits is 8503056, while the sum is 62.

The square root of 986999390 is about 31416.5464365516. The cubic root of 986999390 is about 995.6475469700.

The spelling of 986999390 in words is "nine hundred eighty-six million, nine hundred ninety-nine thousand, three hundred ninety".