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1988450212 = 22773972823
BaseRepresentation
bin111011010000101…
…0101011110100100
312010120121201220011
41312201111132210
513033020401322
6525151220004
7100163355640
oct16641253644
95116551804
101988450212
11930479091
12475b17604
13258c62278
1414c12dc20
15b9880677
hex768557a4

1988450212 has 24 divisors (see below), whose sum is σ = 4031382656. Its totient is φ = 840518208.

The previous prime is 1988450207. The next prime is 1988450231. The reversal of 1988450212 is 2120548891.

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, 484368 + ... + 488455.

Almost surely, 21988450212 is an apocalyptic number.

It is an amenable number.

1988450212 is an abundant number, since it is smaller than the sum of its proper divisors (2042932444).

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

1988450212 is a wasteful number, since it uses less digits than its factorization.

1988450212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972907 (or 972905 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 1988450212 is about 44592.0420254556. The cubic root of 1988450212 is about 1257.4910627313.

The spelling of 1988450212 in words is "one billion, nine hundred eighty-eight million, four hundred fifty thousand, two hundred twelve".

Divisors: 1 2 4 7 14 28 73 146 292 511 1022 2044 972823 1945646 3891292 6809761 13619522 27239044 71016079 142032158 284064316 497112553 994225106 1988450212